@carbking I John, thank you. Is there a trick to installing the plug and washer? The original rebuilder of the carb sent two new washers and I tried to install one at the leaking plug. I installed washer on plug and installed and leaking soon followed. That washer is done and I'm afraid to try another. What am I missing?

 

Could the plug be defective? Notice how close the screwdriver cutout is to the mating surface on one side versus the other. Ignore the worn screw slot. The new gasket did not seem to seal. I have since seated the washer first hoping that would work but alas, it is still leaking leading to believe I need to replace the plug and washer. Now I need to find a new plug

-Would anyone direct me to where I can find a new plug x2 as the below might not last another installation attempt? 

thank you

 

Posted by: @chip

↑

There are some soft metal washers (copper or brass) that should be installed on those tapered screws. Because of ethanol in gasoline many of the older sealants like Permatex are not as gasoline resistant as in the past. I am not a fan of silicone sealants with gasoline. I did find a gas resistant paste type thread sealer at a HVAC supplier. Seems to work well so far.

How about Permatex Permashield, it says it is resistant to all automotive fuels and non-hardening and non-setting for future disassembly. Very frustrating that I am on hold for a screw. If you have the name of the hvac sealer I would be interested in that too. 

 

Similar to Chip, I've had good luck with plain old chemical resistant pipe dope, the stuff plumbers have been using for 100 years. It also works as a low strength thread locker.

The early copper washers were tapered, as was the casting.

The later washers were flat and superseded the tapered ones.

They are somewhat difficult to perfectly center on the plug, as they must be, to seal.

Jon